public class charTest {
    public static void main(String[] args) {
        System.out.println("\u2122");
        //        希望的得到的效果"+"
        //        实际是空字符串,""=""+""
        System.out.println("\u0022+\u0022");
        System.out.println("\"Hello\"");
        System.out.println("\tHello\"");
        System.out.println("\nHello\"");
        System.out.println("\rHello\"");
    }
}
